During a breathing cycle- why do lungs always contain a residual volume of air in it- It makes O2 transport efficient and faster-It helps in CO2 release slower and O2 transport faster-It gives sufficient time for CO2 absorption and O2- release-It gives sufficient time for O2 absorption and CO2- release-

The correct option is D It gives sufficient time for O2 absorption and CO2 release. Residual volume is the amount of air that remains in a person's lungs afte ...

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Standard X

Biology

Respiratory System

During a brea...

Question

During a breathing cycle, why do lungs always contain a residual volume of air in it?

It makes O₂transport efficient and faster.

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It helps in CO₂release slower and O₂ transport faster.

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It gives sufficient time for CO₂ absorption and O₂release.

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It gives sufficient time for O₂ absorption and CO₂release.

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Solution

The correct option is D
It gives sufficient time for O₂ absorption and CO₂release.

Residual volume is the amount of air that remains in a person's lungs after exhaling fully. During the breathing cycle, when air is taken in and let out, the lungs always contain a residual volume of air to ensure that there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released.

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For completion of respiration process, write the given steps in sequential manner.

(a) Diffusion of gases $(O_{2} a n d C O_{2})$ across alveolar membrane.

(b) Transport of gases by blood.

(d) Pulmonary ventilation by which atmospheric air is drawn in and $C O_{2}$ rich alveolar air is released out.

(e) Diffusion of $O_{2} a n d C O_{2}$ between blood and tissues.~

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B. Transport of gases by blood.
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During a breathing cycle, why do lungs always contain a residual volume of air in it?

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